No, having a teaching degree doesn't necessarily make you a good teacher. However, it has been my experience that all teachers are placed in the same category by many homeschool proponents, as if no good teachers exist in the country. That isn't even close to being true.
I think you should go back to school for reading comprehension. I haven't seen one post on here where anyone said that ALL teachers were bad. However, I believe that most here will agree with me that the majority (note that I haven't said ALL) of government schools leave a lot to be desired.